Idea for sci-fi novel: An Enthusiast invents (or inherits or finds or, if this were Stephen King, extrudes) a time machine; it only has one trip in it (Get it? Trip? Because of the drug use! Because of all the drug use). He uses it to go back to 1995 and revive Garcia from his heart attack and, after proving his bona fides as a Time Traveler (with wackiness: “The president is what-now?) nurses him slowly and carefully back to health.
This act leads–both directly and provably–to a Global Holocaust. Rest assured that the words zombies, genitals, and eating will be involved and, quite frankly, it doesn’t matter what order you put those words in, I want no part of it.